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NYS Chemistry Regents Review Practice - Moles/Stoichiometry - Question 10 Print E-mail
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Practice Questions
10. Which of the following is a binary compound?

A)    Hydrogen sulfate

B)    Ammonium sulfide

C)    Ammonium sulfate

D)    Hydrogen sulfide

Correct Answer: Option D - Hydrogen sulfide

A binary compound is a chemical compound that contains exactly two different elements.

Hydrogen sulfide (or hydrogen sulphide) is the chemical compound with the formula H2S. This colorless, toxic and flammable gas is partially responsible for the foul odor of rotten eggs and flatulence.

Incorrect Options

Hydrogen sulfate has 3 kinds of atoms (H, S, O). Its also referred as sulphuric acid. Sulfuric (or sulphuric) acid, H2SO4, is a strong mineral acid.

Ammonium sulphide has 3 kinds (N, H, S). Ammonium sulfide, also known as diammonium sulfide, is an unstable salt with the formula (NH4)2S

Ammonium sulfate has 4 kinds (N, H, S, O). Ammonium sulfate (NH4)2SO4, is an inorganic salt

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